Transcription of DESIGN COEFFICIENT TABLES - CECALC.com
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DESIGN COEFFICIENT TABLES - CECALC.com
- Copyright 2010 All rights reserved 1 DESIGN COEFFICIENT TABLES Hazen-Williams Friction Factor (C) Pipe Material Values for C Range High/Low Average Value Typical DESIGN Value Plastic, PVC, Polyethylene pipe or tubing 160/150 150-155 150 Cement or mastic lined iron or steel pipe 160/130 148 140 copper , brass , lead, tin or glass pipe or tubing 150/120 140 130 Wood Stave 145/110 120 110 Welded or seamless Steel 150/80 130 100 Cast and ductile iron 150/80 130 100 Concrete 152/85 120 100 Corrugated steel - 60 60 Manning s Equation roughness COEFFICIENT (n) Material Values for n Range Typical DESIGN Value Polyethylene pipe Uncoated cast or ductile iron pipe Corrugated steel pipe Concrete pipe Vitrified clay pipe Brick and cement mortar sewers Wood stave Rubble masonry Concrete Culvert Pipe (Smooth) Concrete Boxes (Smooth) Spiral Rib Metal Pipe (Smooth) Corrugated Metal Pipe, Pipe-Arch and Box.
pipe or tubing 160/150 150-155 150 Cement or mastic lined iron or steel pipe 160/130 148 140 Copper, brass, lead, tin or glass pipe or tubing 150/120 140 130 Wood Stave 145/110 120 110 Welded or Seamless Steel 150/80 130 100 Cast and ductile iron 150/80 130 100 Concrete 152/85 120 100 Corrugated steel - 60 60
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